nixinate/flake.nix
matthewcroughan 07a62f362b Use nixos-unstable
This is required to make nixos-rebuild work with flakes.
2022-02-07 00:59:29 +00:00

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{
description = "Nixinate your systems 🕶";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
examples.url = "path:./examples";
};
outputs = { self, nixpkgs, examples, ... }:
let
version = builtins.substring 0 8 self.lastModifiedDate;
supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; overlays = [ self.overlay ]; });
in rec
{
overlay = final: prev: {
generateApps = flake:
let
machines = builtins.attrNames flake.nixosConfigurations;
validMachines = final.lib.remove "" (final.lib.forEach machines (x: final.lib.optionalString (flake.nixosConfigurations."${x}"._module.args ? nixinate) "${x}" ));
mkDeployScript = machine: final.writeScript "deploy-${machine}.sh" ''
set -e
SSH_USER=${flake.nixosConfigurations.${machine}._module.args.nixinate.sshUser}
SSH_HOST=${flake.nixosConfigurations.${machine}._module.args.nixinate.host}
BUILD_ON=${flake.nixosConfigurations.${machine}._module.args.nixinate.buildOn}
echo "🚀 Deploying nixosConfigurations.${machine} from ${flake}"
echo "👤 SSH User: $SSH_USER"
echo "🌐 SSH Host: $SSH_HOST"
if [ $BUILD_ON = "remote" ]; then
echo "🚀 Sending flake to ${machine} via rsync:"
( set -x; ${final.rsync}/bin/rsync -q -vz --recursive --zc=zstd ${flake}/* $SSH_USER@$SSH_HOST:/tmp/nixcfg/ )
echo "🤞 Activating configuration on ${machine} via ssh:"
( set -x; ${final.openssh}/bin/ssh -t $SSH_USER@$SSH_HOST 'sudo nixos-rebuild switch --flake /tmp/nixcfg#${machine}' )
elif [ $BUILD_ON = "local" ]; then
echo "🔨 Building system closure locally, copying it to remote store and activating it:"
( set -x; NIX_SSHOPTS="-t" ${final.nixos-rebuild}/bin/nixos-rebuild switch --flake ${flake}#${machine} --target-host $SSH_USER@$SSH_HOST --use-remote-sudo )
else
echo "_module.args.nixinate.buildOn is not set to a valid value of 'local' or 'remote'"
fi
'';
in
{
nixinate =
(
nixpkgs.lib.genAttrs
validMachines
(x:
{
type = "app";
program = toString (mkDeployScript x);
}
)
);
};
};
nixinate = forAllSystems (system: nixpkgsFor.${system}.generateApps);
apps = nixinate.x86_64-linux examples;
};
}